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lib/vsprintf: Allow to override ISO 8601 date and time separator

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ISO 8601 defines 'T' as a separator between date and time. Though,
some ABIs use time and date with ' ' (space) separator instead.

Add a flavour to the %pt specifier to override default separator.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20210511153958.34527-1-andriy.shevchenko@linux.intel.com
This commit is contained in:
Andy Shevchenko 2021-05-11 18:39:55 +03:00 committed by Petr Mladek
parent 7f3d08b255
commit 20bc8c1e97
3 changed files with 28 additions and 6 deletions
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7
Documentation/core-api/printk-formats.rst
View file

@ -514,9 +514,10 @@ Time and date
::
%pt[RT] YYYY-mm-ddTHH:MM:SS
%pt[RT]s YYYY-mm-dd HH:MM:SS
%pt[RT]d YYYY-mm-dd
%pt[RT]t HH:MM:SS
%pt[RT][dt][r]
%pt[RT][dt][r][s]
For printing date and time as represented by::
@ -528,6 +529,10 @@ in human readable format.
By default year will be incremented by 1900 and month by 1.
Use %pt[RT]r (raw) to suppress this behaviour.
The %pt[RT]s (space) will override ISO 8601 separator by using ' ' (space)
instead of 'T' (Capital T) between date and time. It won't have any effect
when date or time is omitted.
Passed by reference.
struct clk

5
lib/test_printf.c
View file

@ -528,6 +528,11 @@ time_and_date(void)
test("0119-00-04T15:32:23", "%ptTr", &t);
test("15:32:23|2019-01-04", "%ptTt|%ptTd", &t, &t);
test("15:32:23|0119-00-04", "%ptTtr|%ptTdr", &t, &t);
test("2019-01-04 15:32:23", "%ptTs", &t);
test("0119-00-04 15:32:23", "%ptTsr", &t);
test("15:32:23|2019-01-04", "%ptTts|%ptTds", &t, &t);
test("15:32:23|0119-00-04", "%ptTtrs|%ptTdrs", &t, &t);
}
static void __init

22
lib/vsprintf.c
View file

@ -1798,7 +1798,8 @@ char *rtc_str(char *buf, char *end, const struct rtc_time *tm,
struct printf_spec spec, const char *fmt)
{
bool have_t = true, have_d = true;
bool raw = false;
bool raw = false, iso8601_separator = true;
bool found = true;
int count = 2;
if (check_pointer(&buf, end, tm, spec))
@ -1815,14 +1816,25 @@ char *rtc_str(char *buf, char *end, const struct rtc_time *tm,
break;
}
raw = fmt[count] == 'r';
do {
switch (fmt[count++]) {
case 'r':
raw = true;
break;
case 's':
iso8601_separator = false;
break;
default:
found = false;
break;
}
} while (found);
if (have_d)
buf = date_str(buf, end, tm, raw);
if (have_d && have_t) {
/* Respect ISO 8601 */
if (buf < end)
*buf = 'T';
*buf = iso8601_separator ? 'T' : ' ';
buf++;
}
if (have_t)
@ -2261,7 +2273,7 @@ early_param("no_hash_pointers", no_hash_pointers_enable);
* - 'd[234]' For a dentry name (optionally 2-4 last components)
* - 'D[234]' Same as 'd' but for a struct file
* - 'g' For block_device name (gendisk + partition number)
* - 't[RT][dt][r]' For time and date as represented by:
* - 't[RT][dt][r][s]' For time and date as represented by:
* R struct rtc_time
* T time64_t
* - 'C' For a clock, it prints the name (Common Clock Framework) or address